ae re 
128 THE Microscope. 
Prof. Allen Y. Moore, M. D., of Cleveland, Ohio, and Mr. 
W.C. J. Hall, of Jamestown, N. Y., are the Assistant Directors 
in the Working Session, and much may be expected from their 
experience in microscopy. 
A more delightful place for our meeting than Chautauqua, 
could not well be found. It is free from the noise and confusion 
the dust and the smoke of great cities, and being on the shore 
of a beautiful lake, it is a resort where the weary seek for rest. 
It has good hotel and cottage accommodations at moderate rates, 
and all railroads give greatly reduced fares to and from Chau- 
tauqua. 
May the hearty good will which has been among the mem- 
bers of the A. S. M. at all our meetings continue during all fu- 
ture conventions. 
SECTIONS OF TEETH. 
DR. W. C. BRITTAN, DETROIT, MICHIGAN. 
ae beautiful sections of the jaws of small animals with 
the teeth in situ may be made in the following way: The 
jaws of a well injected animal are placed for a few days in 50 
per cent. alcohol, then into absolute alcohol for about two 
weeks, then with a fine sharp file cut away the bone from both 
sides of the jaw where the section is desired until, by holding to 
the light, the pulps of the teeth are visible, carefully keeping 
the piece and the file wet with alcohol during the operation. 
Thoroughly wash the piece with a soft brush in alcohol and 
place in clove oil for a few hours, or until clear. Then transfer 
to a very thin solution of balsam in benzole, gradually thicken- 
ing the solution from day to day by adding pure balsam until 
the tissues are thoroughly permeated. This is an important 
part of the process and should not be hurried. Now place the 
piece in some shallow dish and add pure balsam enough to 
cover it and evaporate to hardness, being careful not to raise the 
heat above 110° F. When the balsam is hard the section may 
be worked down to suit. The balsam will hold the soft parts in 
position while this is being done; use water as a lubricant for 
this part of the work. The section made to suit, dissolve out 
the balsam with benzole, place in absolute alcohol for a day, 
